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语法:

align-items:flex-start | flex-end | center | baseline | stretch

默认值stretch

适用于:flex容器

继承性:无

动画性:是

计算值:指定值

取值:

  • flex-start:弹性盒子元素的侧轴(纵轴)起始位置的边界紧靠住该行的侧轴起始边界。

  • flex-end:弹性盒子元素的侧轴(纵轴)起始位置的边界紧靠住该行的侧轴结束边界。

  • center:弹性盒子元素在该行的侧轴(纵轴)上居中放置。(如果该行的尺寸小于弹性盒子元素的尺寸,则会向两个方向溢出相同的长度)。

  • baseline:如弹性盒子元素的行内轴与侧轴为同一条,则该值与'flex-start'等效。其它情况下,该值将参与基线对齐。

  • stretch:如果指定侧轴大小的属性值为'auto',则其值会使项目的边距盒的尺寸尽可能接近所在行的尺寸,但同时会遵照'min/max-width/height'属性的限制。

说明:

定义flex子项在flex容器的当前行的侧轴(纵轴)方向上的对齐方式。
  • 对应的脚本特性为alignItems

兼容性:

ValuesIEFirefoxChromeSafariOperaiOS SafariAndroid BrowserAndroid Chrome
Basic Support6.0-10.02.0-21.04.0-20.06.015.0+-webkit-6.0-6.12.1-4.318.0-19.0
11.0+22.0+21.0+-webkit-6.1+-webkit-17.0+7.0+-webkit-4.4+20.0+-webkit-
29.0+9.0+9.0+28.0+

示例:

实例

<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>align-items_CSS参考手册_web前端开发参考手册系列</title>
<meta name="author" content="Joy Du(飘零雾雨), dooyoe@gmail.com, www.doyoe.com" />
<style>
h1{font:bold 20px/1.5 georgia,simsun,sans-serif;}
.box{
	display:-webkit-flex;
	display:flex;
	width:200px;height:100px;margin:0;padding:0;border-radius:5px;list-style:none;background-color:#eee;}
.box li{margin:5px;border-radius:5px;background:#aaa;text-align:center;}
.box li:nth-child(1){padding:10px;}
.box li:nth-child(2){padding:15px 10px;}
.box li:nth-child(3){padding:20px 10px;}
#box{
	-webkit-align-items:flex-start;
	align-items:flex-start;
}
#box2{
	-webkit-align-items:flex-end;
	align-items:flex-end;
}
#box3{
	-webkit-align-items:center;
	align-items:center;
}
#box4{
	-webkit-align-items:baseline;
	align-items:baseline;
}
#box5{
	-webkit-align-items:strecth;
	align-items:strecth;
}
</style>
</head>
<body>
<h1>align-items示例:</h1>
<h2>align-items:flex-start</h2>
<ul id="box" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
<h2>align-items:flex-end</h2>
<ul id="box2" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
<h2>align-items:center</h2>
<ul id="box3" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
<h2>align-items:baseline</h2>
<ul id="box4" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
<h2>align-items:strecth</h2>
<ul id="box5" class="box">
	<li>a</li>
	<li>b</li>
	<li>c</li>
</ul>
</body>
</html>
			

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